Objects returned by sub-resource locators are not injected by the JAX-
RS runtime since their lifecycle is under the control of the
application rather than the runtime.
Marc.
On Feb 27, 2009, at 4:13 PM, Rabick, Mark A (MS) wrote:
> I've got a resource base class that injects the @Context information:
>
> import javax.ws.rs.core.Context;
> import javax.ws.rs.core.HttpHeaders;
> import javax.ws.rs.core.Request;
> import javax.ws.rs.core.SecurityContext;
> import javax.ws.rs.core.UriInfo;
> import javax.ws.rs.ext.Providers;
>
> public class BaseResource {
>
> @Context
> protected SecurityContext securityContext;
> @Context
> protected UriInfo uriInfo;
> @Context
> protected Request request;
> @Context
> protected HttpHeaders httpHeaders;
> @Context
> protected Providers providers;
>
> public BaseResource() {
> super();
> }
>
> }
>
> If I have a resource with a sub-resource locator:
>
> @Path("/")
> public class NodesResource extends BaseResource {
>
> @EJB private NodeRemote nodeRemote;
>
> @Path("/v1/nodes")
> public NodesV1Resource getNodesV1Resource() {
> System.out.println("uriInfo: " +
> uriInfo.getMatchedURIs().toString());
> System.out.println("uriInfo: " +
> uriInfo.getMatchedResources().toString());
> return new NodesV1Resource(nodeRemote);
> }
> }
>
> The System.out-s display the expected output. The sub-resource
> class is:
>
> public class NodesV1Resource extends BaseResource {
>
> private NodeRemote nodeRemote;
>
> public NodesV1Resource(NodeRemote nodeRemote) {
> this.nodeRemote = nodeRemote;
> }
>
> @GET @Path("{sk}")
>
> @Produces({MediaType.APPLICATION_XML,MediaType.APPLICATION_JSON})
> public NodeV1 getNodeV1ByKey(@PathParam("sk") String sk) {
>
> System.out.println("uriInfo: " +
> uriInfo.getMatchedURIs().toString());
> System.out.println("uriInfo: " +
> uriInfo.getMatchedResources().toString());
>
> Node node = nodeRemote.getBySk(sk);
>
> if (node == null)
> throw new NotFoundException("Node not found
> for sk: " + sk);
>
> NodeV1 nodeV1 = (new BuilderV1()).buildNodeV1(node);
>
> return nodeV1;
> }
>
> I get NullPointerException-s on the System.out calls in
> getNodeV1ByKey. It doesn't appear to inject the UriInfo and other
> @Context annotated elements in the BaseResource if the method is in
> a sub-resource. I can inject the specific @Context in the method:
>
> public NodeV1 getNodeV1ByKey(@Context UriInfo uriInfo,
> @PathParam("sk") String sk) {…}
>
> Another point, I have to pass the EJB remote interface from the
> NodesResource base resource in the constructor of the
> NodesV1Resource. It doesn't inject the @EJB in a sub-resource
> either. Is this spec behavior? Does injection (either @Context or
> InjectableProvider) only occur on base resource classes or in
> parameters to subresource methods?
>
> --mark
> _______________________________________________
> Mark A. Rabick
> Software Engineer
> Northrop Grumman - C2 Systems (MS/C2SD/IIS)
> 3200 Samson Way
> Bellevue, NE 68123
> Ph: (402) 293-7091
> Em: mark.rabick_at_ngc.com
> Remember PFC Ross A. McGinnis...
> http://www.army.mil/medalofhonor/McGinnis/index.html
> ... MA2 Michael A. Monsoor, Lt. Michael P. Murphy, Cpl. Jason
> Dunham, SFC Paul Ray Smith and the rest...
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>